package com.itheima.reggie.controller;

import cn.hutool.core.io.IoUtil;
import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.OSSObject;
import com.aliyun.oss.model.ObjectListing;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    /**
     * 文件上传接口
     *
     * @return R
     * @author Mosetian
     * @date 2022-9-12 18:06
     * @param    file
     */
    @PostMapping("/upload")
    public R upload(MultipartFile file) {
        /*//获取原始的文件名
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));

        String fileName = UUID.randomUUID().toString() + suffix;

        //判断文件夹是否存在，不存在则创建
        File dir = new File(basePath);
        if(!dir.exists()){
            dir.mkdirs();
        }

        try {
            file.transferTo(new File(basePath + "\\" + fileName));
            return R.success(fileName);
        } catch (IOException e) {
            e.printStackTrace();
            return R.error("图片上传失败");
        }*/
        //得到处理后的文件名
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        String fileName = UUID.randomUUID().toString() + suffix;

        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
        String accessKeyId = "LTAI5t9bngwPNZZt4jQ84X2M";
        String accessKeySecret = "AUXV5aGLgbdXdCBQOrqCaZ3lACw4DQ";
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "reggie-dishimg";
        // 填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。
        String objectName = "images/" + fileName;

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

       /* try {
//            String content = "Hello OSS";
            ossClient.putObject(bucketName, objectName, file.getInputStream());
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }*/


        try {
            ossClient.putObject(bucketName, objectName, file.getInputStream());
        } catch (IOException e) {
            e.printStackTrace();
        }

        ossClient.shutdown();

        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) {
        /*try {
            //读取磁盘中的文件 IO流

            // 强制要求浏览器下载。
            response.setHeader("Content-Dispostion", "attachment;filename=" + new String(name.getBytes(), "ISO-8859-1"));

            FileInputStream fileInputStream = new FileInputStream(basePath + "\\" + name);
            IoUtil.copy(fileInputStream, response.getOutputStream());
            fileInputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }*/

        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
        String accessKeyId = "LTAI5t9bngwPNZZt4jQ84X2M";
        String accessKeySecret = "AUXV5aGLgbdXdCBQOrqCaZ3lACw4DQ";
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "reggie-dishimg";
        // 填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。
        String objectName = "images/" + name;

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            // 调用ossClient.getObject返回一个OSSObject实例，该实例包含文件内容及文件元信息。
            OSSObject ossObject = ossClient.getObject(bucketName, objectName);
            // 调用ossObject.getObjectContent获取文件输入流，可读取此输入流获取其内容。
            InputStream content = ossObject.getObjectContent();
            if (content != null) {

                int len;
                byte[] bytes = new byte[1024];
                ServletOutputStream outputStream = response.getOutputStream();
                //输出流返回给页面
                while ((len = content.read(bytes)) != -1) {
                    outputStream.write(bytes, 0, len);
                    outputStream.flush();
                }
                outputStream.close();
                // 数据读取完成后，获取的流必须关闭，否则会造成连接泄漏，导致请求无连接可用，程序无法正常工作。
                content.close();
            }
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } catch (IOException e) {
            e.printStackTrace();
        }

        ossClient.shutdown();
    }
}
